diff options
Diffstat (limited to 'src/hash.h')
| -rw-r--r-- | src/hash.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/hash.h b/src/hash.h index c16bbb48ce..6d876076ee 100644 --- a/src/hash.h +++ b/src/hash.h @@ -15,6 +15,7 @@ #include <uint256.h> #include <version.h> +#include <string> #include <vector> typedef uint256 ChainCode; @@ -202,4 +203,12 @@ unsigned int MurmurHash3(unsigned int nHashSeed, Span<const unsigned char> vData void BIP32Hash(const ChainCode &chainCode, unsigned int nChild, unsigned char header, const unsigned char data[32], unsigned char output[64]); +/** Return a CHashWriter primed for tagged hashes (as specified in BIP 340). + * + * The returned object will have SHA256(tag) written to it twice (= 64 bytes). + * A tagged hash can be computed by feeding the message into this object, and + * then calling CHashWriter::GetSHA256(). + */ +CHashWriter TaggedHash(const std::string& tag); + #endif // BITCOIN_HASH_H |